mirror of
https://gitee.com/xia-chu/ZLMediaKit.git
synced 2026-05-06 10:57:50 +08:00
809 lines
26 KiB
C++
809 lines
26 KiB
C++
/*
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* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#if defined(ENABLE_FFMPEG)
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#if !defined(_WIN32)
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#include <dlfcn.h>
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#endif
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#include "Util/File.h"
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#include "Util/uv_errno.h"
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#include "Transcode.h"
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#include "Common/config.h"
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#define MAX_DELAY_SECOND 3
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using namespace std;
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using namespace toolkit;
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namespace mediakit {
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static string ffmpeg_err(int errnum) {
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char errbuf[AV_ERROR_MAX_STRING_SIZE];
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av_strerror(errnum, errbuf, AV_ERROR_MAX_STRING_SIZE);
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return errbuf;
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}
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std::unique_ptr<AVPacket, void (*)(AVPacket *)> alloc_av_packet() {
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return std::unique_ptr<AVPacket, void (*)(AVPacket *)>(av_packet_alloc(), [](AVPacket *pkt) { av_packet_free(&pkt); });
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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static void on_ffmpeg_log(void *ctx, int level, const char *fmt, va_list args) {
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GET_CONFIG(bool, enable_ffmpeg_log, General::kEnableFFmpegLog);
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if (!enable_ffmpeg_log) {
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return;
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}
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LogLevel lev;
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switch (level) {
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case AV_LOG_FATAL: lev = LError; break;
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case AV_LOG_ERROR: lev = LError; break;
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case AV_LOG_WARNING: lev = LWarn; break;
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case AV_LOG_INFO: lev = LInfo; break;
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case AV_LOG_VERBOSE: lev = LDebug; break;
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case AV_LOG_DEBUG: lev = LDebug; break;
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case AV_LOG_TRACE: lev = LTrace; break;
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default: lev = LTrace; break;
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}
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LoggerWrapper::printLogV(::toolkit::getLogger(), lev, __FILE__, ctx ? av_default_item_name(ctx) : "NULL", level, fmt, args);
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}
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static bool setupFFmpeg_l() {
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av_log_set_level(AV_LOG_TRACE);
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av_log_set_flags(AV_LOG_PRINT_LEVEL);
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av_log_set_callback(on_ffmpeg_log);
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#if (LIBAVCODEC_VERSION_MAJOR < 58)
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avcodec_register_all();
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#endif
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return true;
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}
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static void setupFFmpeg() {
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static auto flag = setupFFmpeg_l();
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}
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static bool checkIfSupportedNvidia_l() {
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#if !defined(_WIN32)
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GET_CONFIG(bool, check_nvidia_dev, General::kCheckNvidiaDev);
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if (!check_nvidia_dev) {
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return false;
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}
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auto so = dlopen("libnvcuvid.so.1", RTLD_LAZY);
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if (!so) {
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WarnL << "libnvcuvid.so.1加载失败:" << get_uv_errmsg();
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return false;
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}
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dlclose(so);
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bool find_driver = false;
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File::scanDir("/dev", [&](const string &path, bool is_dir) {
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if (!is_dir && start_with(path, "/dev/nvidia")) {
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// 找到nvidia的驱动 [AUTO-TRANSLATED:5b87bf81]
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// Find the Nvidia driver
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find_driver = true;
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return false;
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}
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return true;
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}, false);
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if (!find_driver) {
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WarnL << "英伟达硬件编解码器驱动文件 /dev/nvidia* 不存在";
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}
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return find_driver;
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#else
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return false;
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#endif
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}
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static bool checkIfSupportedNvidia() {
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static auto ret = checkIfSupportedNvidia_l();
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return ret;
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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bool TaskManager::addEncodeTask(function<void()> task) {
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{
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lock_guard<mutex> lck(_task_mtx);
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_task.emplace_back(std::move(task));
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if (_task.size() > _max_task) {
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WarnL << "encoder thread task is too more, now drop frame!";
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_task.pop_front();
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}
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}
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_sem.post();
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return true;
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}
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bool TaskManager::addDecodeTask(bool key_frame, function<void()> task) {
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{
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lock_guard<mutex> lck(_task_mtx);
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if (_decode_drop_start) {
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if (!key_frame) {
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TraceL << "decode thread drop frame";
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return false;
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}
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_decode_drop_start = false;
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InfoL << "decode thread stop drop frame";
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}
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_task.emplace_back(std::move(task));
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if (_task.size() > _max_task) {
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_decode_drop_start = true;
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WarnL << "decode thread start drop frame";
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}
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}
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_sem.post();
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return true;
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}
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void TaskManager::setMaxTaskSize(size_t size) {
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CHECK(size >= 3 && size <= 1000, "async task size limited to 3 ~ 1000, now size is:", size);
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_max_task = size;
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}
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void TaskManager::startThread(const string &name) {
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_thread.reset(new thread([this, name]() {
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onThreadRun(name);
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}), [](thread *ptr) {
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ptr->join();
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delete ptr;
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});
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}
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void TaskManager::stopThread(bool drop_task) {
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TimeTicker();
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if (!_thread) {
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return;
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}
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{
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lock_guard<mutex> lck(_task_mtx);
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if (drop_task) {
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_exit = true;
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_task.clear();
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}
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_task.emplace_back([]() {
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throw ThreadExitException();
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});
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}
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_sem.post(10);
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_thread = nullptr;
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}
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TaskManager::~TaskManager() {
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stopThread(true);
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}
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bool TaskManager::isEnabled() const {
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return _thread.operator bool();
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}
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void TaskManager::onThreadRun(const string &name) {
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setThreadName(name.data());
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function<void()> task;
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_exit = false;
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while (!_exit) {
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_sem.wait();
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{
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unique_lock<mutex> lck(_task_mtx);
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if (_task.empty()) {
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continue;
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}
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task = _task.front();
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_task.pop_front();
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}
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try {
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TimeTicker2(50, TraceL);
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task();
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task = nullptr;
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} catch (ThreadExitException &ex) {
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break;
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} catch (std::exception &ex) {
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WarnL << ex.what();
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continue;
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} catch (...) {
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WarnL << "catch one unknown exception";
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throw;
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}
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}
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InfoL << name << " exited!";
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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FFmpegFrame::FFmpegFrame(std::shared_ptr<AVFrame> frame) {
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if (frame) {
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_frame = std::move(frame);
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} else {
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_frame.reset(av_frame_alloc(), [](AVFrame *ptr) {
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av_frame_free(&ptr);
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});
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}
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}
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FFmpegFrame::~FFmpegFrame() {
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if (_data) {
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delete[] _data;
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_data = nullptr;
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}
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}
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AVFrame *FFmpegFrame::get() const {
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return _frame.get();
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}
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void FFmpegFrame::fillPicture(AVPixelFormat target_format, int target_width, int target_height) {
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assert(_data == nullptr);
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_data = new char[av_image_get_buffer_size(target_format, target_width, target_height, 32)];
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av_image_fill_arrays(_frame->data, _frame->linesize, (uint8_t *) _data, target_format, target_width, target_height, 32);
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}
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///////////////////////////////////////////////////////////////////////////
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template<bool decoder = true>
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static inline const AVCodec *getCodec_l(const char *name) {
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auto codec = decoder ? avcodec_find_decoder_by_name(name) : avcodec_find_encoder_by_name(name);
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if (codec) {
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InfoL << (decoder ? "got decoder:" : "got encoder:") << name;
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} else {
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TraceL << (decoder ? "decoder:" : "encoder:") << name << " not found";
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}
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return codec;
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}
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template<bool decoder = true>
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static inline const AVCodec *getCodec_l(enum AVCodecID id) {
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auto codec = decoder ? avcodec_find_decoder(id) : avcodec_find_encoder(id);
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if (codec) {
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InfoL << (decoder ? "got decoder:" : "got encoder:") << avcodec_get_name(id);
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} else {
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TraceL << (decoder ? "decoder:" : "encoder:") << avcodec_get_name(id) << " not found";
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}
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return codec;
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}
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class CodecName {
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public:
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CodecName(string name) : _codec_name(std::move(name)) {}
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CodecName(enum AVCodecID id) : _id(id) {}
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template <bool decoder>
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const AVCodec *getCodec() const {
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if (!_codec_name.empty()) {
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return getCodec_l<decoder>(_codec_name.data());
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}
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return getCodec_l<decoder>(_id);
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}
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private:
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string _codec_name;
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enum AVCodecID _id;
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};
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template <bool decoder = true>
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static inline const AVCodec *getCodec(const std::initializer_list<CodecName> &codec_list) {
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const AVCodec *ret = nullptr;
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for (int i = codec_list.size(); i >= 1; --i) {
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ret = codec_list.begin()[i - 1].getCodec<decoder>();
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if (ret) {
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return ret;
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}
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}
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return ret;
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}
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template<bool decoder = true>
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static inline const AVCodec *getCodecByName(const std::vector<std::string> &codec_list) {
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const AVCodec *ret = nullptr;
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for (auto &codec : codec_list) {
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ret = getCodec_l<decoder>(codec.data());
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if (ret) {
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return ret;
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}
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}
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return ret;
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}
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FFmpegDecoder::FFmpegDecoder(const Track::Ptr &track, int thread_num, const std::vector<std::string> &codec_name) {
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setupFFmpeg();
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_frame_pool.setSize(AV_NUM_DATA_POINTERS);
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const AVCodec *codec = nullptr;
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const AVCodec *codec_default = nullptr;
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if (!codec_name.empty()) {
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codec = getCodecByName(codec_name);
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}
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switch (track->getCodecId()) {
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case CodecH264:
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codec_default = getCodec({AV_CODEC_ID_H264});
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if (codec && codec->id == AV_CODEC_ID_H264) {
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break;
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}
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if (checkIfSupportedNvidia()) {
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codec = getCodec({{"libopenh264"}, {AV_CODEC_ID_H264}, {"h264_qsv"}, {"h264_videotoolbox"}, {"h264_cuvid"}, {"h264_nvmpi"}});
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} else {
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codec = getCodec({{"libopenh264"}, {AV_CODEC_ID_H264}, {"h264_qsv"}, {"h264_videotoolbox"}, {"h264_nvmpi"}});
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}
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break;
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case CodecH265:
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codec_default = getCodec({AV_CODEC_ID_HEVC});
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if (codec && codec->id == AV_CODEC_ID_HEVC) {
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break;
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}
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if (checkIfSupportedNvidia()) {
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codec = getCodec({{AV_CODEC_ID_HEVC}, {"hevc_qsv"}, {"hevc_videotoolbox"}, {"hevc_cuvid"}, {"hevc_nvmpi"}});
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} else {
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codec = getCodec({{AV_CODEC_ID_HEVC}, {"hevc_qsv"}, {"hevc_videotoolbox"}, {"hevc_nvmpi"}});
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}
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break;
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case CodecAAC:
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if (codec && codec->id == AV_CODEC_ID_AAC) {
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break;
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}
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codec = getCodec({AV_CODEC_ID_AAC});
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break;
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case CodecG711A:
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if (codec && codec->id == AV_CODEC_ID_PCM_ALAW) {
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break;
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}
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codec = getCodec({AV_CODEC_ID_PCM_ALAW});
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break;
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case CodecG711U:
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if (codec && codec->id == AV_CODEC_ID_PCM_MULAW) {
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break;
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}
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codec = getCodec({AV_CODEC_ID_PCM_MULAW});
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break;
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case CodecOpus:
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if (codec && codec->id == AV_CODEC_ID_OPUS) {
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break;
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}
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codec = getCodec({AV_CODEC_ID_OPUS});
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break;
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case CodecJPEG:
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if (codec && codec->id == AV_CODEC_ID_MJPEG) {
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break;
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}
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codec = getCodec({AV_CODEC_ID_MJPEG});
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break;
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case CodecVP8:
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if (codec && codec->id == AV_CODEC_ID_VP8) {
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break;
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}
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codec = getCodec({AV_CODEC_ID_VP8});
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break;
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case CodecVP9:
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if (codec && codec->id == AV_CODEC_ID_VP9) {
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break;
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}
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codec = getCodec({AV_CODEC_ID_VP9});
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break;
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default: codec = nullptr; break;
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}
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codec = codec ? codec : codec_default;
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if (!codec) {
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throw std::runtime_error("未找到解码器");
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}
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while (true) {
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_context.reset(avcodec_alloc_context3(codec), [](AVCodecContext *ctx) {
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avcodec_free_context(&ctx);
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});
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if (!_context) {
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throw std::runtime_error("创建解码器失败");
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}
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// 保存AVFrame的引用 [AUTO-TRANSLATED:2df53d07]
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// Save the AVFrame reference
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#ifdef FF_API_OLD_ENCDEC
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_context->refcounted_frames = 1;
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#endif
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_context->flags |= AV_CODEC_FLAG_LOW_DELAY;
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_context->flags2 |= AV_CODEC_FLAG2_FAST;
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if (track->getTrackType() == TrackVideo) {
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_context->width = static_pointer_cast<VideoTrack>(track)->getVideoWidth();
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_context->height = static_pointer_cast<VideoTrack>(track)->getVideoHeight();
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InfoL << "media source :" << _context->width << " X " << _context->height;
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}
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switch (track->getCodecId()) {
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case CodecG711A:
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case CodecG711U: {
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AudioTrack::Ptr audio = static_pointer_cast<AudioTrack>(track);
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#if LIBAVCODEC_VERSION_INT >= FF_CODEC_VER_7_1
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av_channel_layout_default(&_context->ch_layout, audio->getAudioChannel());
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#else
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_context->channels = audio->getAudioChannel();
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_context->channel_layout = av_get_default_channel_layout(_context->channels);
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#endif
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_context->sample_rate = audio->getAudioSampleRate();
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break;
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}
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default:
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break;
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}
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AVDictionary *dict = nullptr;
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if (thread_num <= 0) {
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av_dict_set(&dict, "threads", "auto", 0);
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} else {
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av_dict_set(&dict, "threads", to_string(MIN((unsigned int)thread_num, thread::hardware_concurrency())).data(), 0);
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}
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av_dict_set(&dict, "zerolatency", "1", 0);
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av_dict_set(&dict, "strict", "-2", 0);
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#ifdef AV_CODEC_CAP_TRUNCATED
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if (codec->capabilities & AV_CODEC_CAP_TRUNCATED) {
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/* we do not send complete frames */
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_context->flags |= AV_CODEC_FLAG_TRUNCATED;
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_do_merger = false;
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} else {
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// 此时业务层应该需要合帧 [AUTO-TRANSLATED:8dea0fff]
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// The business layer should need to merge frames at this time
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_do_merger = true;
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}
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#endif
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int ret = avcodec_open2(_context.get(), codec, &dict);
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av_dict_free(&dict);
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if (ret >= 0) {
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// 成功 [AUTO-TRANSLATED:7d878ca9]
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// Success
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InfoL << "打开解码器成功:" << codec->name;
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break;
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}
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if (codec_default && codec_default != codec) {
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// 硬件编解码器打开失败，尝试软件的 [AUTO-TRANSLATED:060200f4]
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// Hardware codec failed to open, try software codec
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WarnL << "打开解码器" << codec->name << "失败，原因是:" << ffmpeg_err(ret) << ", 再尝试打开解码器" << codec_default->name;
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codec = codec_default;
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continue;
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}
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throw std::runtime_error(StrPrinter << "打开解码器" << codec->name << "失败:" << ffmpeg_err(ret));
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}
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}
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FFmpegDecoder::~FFmpegDecoder() {
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stopThread(true);
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if (_do_merger) {
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_merger.flush();
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}
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flush();
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}
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void FFmpegDecoder::flush() {
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while (true) {
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auto out_frame = _frame_pool.obtain2();
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auto ret = avcodec_receive_frame(_context.get(), out_frame->get());
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if (ret == AVERROR(EAGAIN)) {
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avcodec_send_packet(_context.get(), nullptr);
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continue;
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}
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if (ret == AVERROR_EOF) {
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break;
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}
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if (ret < 0) {
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WarnL << "avcodec_receive_frame failed:" << ffmpeg_err(ret);
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break;
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}
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onDecode(out_frame);
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}
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}
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const AVCodecContext *FFmpegDecoder::getContext() const {
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return _context.get();
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}
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bool FFmpegDecoder::inputFrame_l(const Frame::Ptr &frame, bool live, bool enable_merge) {
|
|
if (_do_merger && enable_merge) {
|
|
return _merger.inputFrame(frame, [this, live](uint64_t dts, uint64_t pts, const Buffer::Ptr &buffer, bool have_idr) {
|
|
decodeFrame(buffer->data(), buffer->size(), dts, pts, live, have_idr);
|
|
});
|
|
}
|
|
|
|
return decodeFrame(frame->data(), frame->size(), frame->dts(), frame->pts(), live, frame->keyFrame());
|
|
}
|
|
|
|
bool FFmpegDecoder::inputFrame(const Frame::Ptr &frame, bool live, bool async, bool enable_merge) {
|
|
if (async && !TaskManager::isEnabled() && getContext()->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
// 开启异步编码，且为视频，尝试启动异步解码线程 [AUTO-TRANSLATED:17a68fc6]
|
|
// Enable asynchronous encoding, and it is video, try to start asynchronous decoding thread
|
|
startThread("decoder thread");
|
|
}
|
|
|
|
if (!async || !TaskManager::isEnabled()) {
|
|
return inputFrame_l(frame, live, enable_merge);
|
|
}
|
|
|
|
auto frame_cache = Frame::getCacheAbleFrame(frame);
|
|
return addDecodeTask(frame->keyFrame(), [this, live, frame_cache, enable_merge]() {
|
|
inputFrame_l(frame_cache, live, enable_merge);
|
|
// 此处模拟解码太慢导致的主动丢帧 [AUTO-TRANSLATED:fc8bea8a]
|
|
// Here simulates decoding too slow, resulting in active frame dropping
|
|
// usleep(100 * 1000);
|
|
});
|
|
}
|
|
|
|
bool FFmpegDecoder::decodeFrame(const char *data, size_t size, uint64_t dts, uint64_t pts, bool live, bool key_frame) {
|
|
TimeTicker2(30, TraceL);
|
|
|
|
auto pkt = alloc_av_packet();
|
|
pkt->data = (uint8_t *)data;
|
|
pkt->size = size;
|
|
pkt->dts = dts;
|
|
pkt->pts = pts;
|
|
if (key_frame) {
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
}
|
|
|
|
auto ret = avcodec_send_packet(_context.get(), pkt.get());
|
|
if (ret < 0) {
|
|
if (ret != AVERROR_INVALIDDATA) {
|
|
WarnL << "avcodec_send_packet failed:" << ffmpeg_err(ret);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
for (;;) {
|
|
auto out_frame = _frame_pool.obtain2();
|
|
ret = avcodec_receive_frame(_context.get(), out_frame->get());
|
|
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
|
|
break;
|
|
}
|
|
if (ret < 0) {
|
|
WarnL << "avcodec_receive_frame failed:" << ffmpeg_err(ret);
|
|
break;
|
|
}
|
|
if (live && pts - out_frame->get()->pts > MAX_DELAY_SECOND * 1000 && _ticker.createdTime() > 10 * 1000) {
|
|
// 后面的帧才忽略,防止Track无法ready [AUTO-TRANSLATED:23f1a7c9]
|
|
// The following frames are ignored to prevent the Track from being ready
|
|
WarnL << "解码时，忽略" << MAX_DELAY_SECOND << "秒前的数据:" << pts << " " << out_frame->get()->pts;
|
|
continue;
|
|
}
|
|
onDecode(out_frame);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void FFmpegDecoder::setOnDecode(FFmpegDecoder::onDec cb) {
|
|
_cb = std::move(cb);
|
|
}
|
|
|
|
void FFmpegDecoder::onDecode(const FFmpegFrame::Ptr &frame) {
|
|
if (_cb) {
|
|
_cb(frame);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
#if LIBAVCODEC_VERSION_INT >= FF_CODEC_VER_7_1
|
|
FFmpegSwr::FFmpegSwr(AVSampleFormat output, AVChannelLayout *ch_layout, int samplerate) {
|
|
_target_format = output;
|
|
av_channel_layout_copy(&_target_ch_layout, ch_layout);
|
|
_target_samplerate = samplerate;
|
|
}
|
|
#else
|
|
FFmpegSwr::FFmpegSwr(AVSampleFormat output, int channel, int channel_layout, int samplerate) {
|
|
_target_format = output;
|
|
_target_channels = channel;
|
|
_target_channel_layout = channel_layout;
|
|
_target_samplerate = samplerate;
|
|
|
|
_swr_frame_pool.setSize(AV_NUM_DATA_POINTERS);
|
|
}
|
|
#endif
|
|
|
|
FFmpegSwr::~FFmpegSwr() {
|
|
if (_ctx) {
|
|
swr_free(&_ctx);
|
|
}
|
|
#if LIBAVCODEC_VERSION_INT >= FF_CODEC_VER_7_1
|
|
av_channel_layout_uninit(&_target_ch_layout);
|
|
#endif
|
|
}
|
|
|
|
FFmpegFrame::Ptr FFmpegSwr::inputFrame(const FFmpegFrame::Ptr &frame) {
|
|
if (frame->get()->format == _target_format &&
|
|
|
|
#if LIBAVCODEC_VERSION_INT >= FF_CODEC_VER_7_1
|
|
!av_channel_layout_compare(&(frame->get()->ch_layout), &_target_ch_layout) &&
|
|
#else
|
|
frame->get()->channels == _target_channels && frame->get()->channel_layout == (uint64_t)_target_channel_layout &&
|
|
#endif
|
|
|
|
frame->get()->sample_rate == _target_samplerate) {
|
|
// 不转格式 [AUTO-TRANSLATED:31dc6ae1]
|
|
// Do not convert format
|
|
return frame;
|
|
}
|
|
if (!_ctx) {
|
|
|
|
#if LIBAVCODEC_VERSION_INT >= FF_CODEC_VER_7_1
|
|
_ctx = swr_alloc();
|
|
swr_alloc_set_opts2(&_ctx,
|
|
&_target_ch_layout, _target_format, _target_samplerate,
|
|
&frame->get()->ch_layout, (AVSampleFormat)frame->get()->format, frame->get()->sample_rate,
|
|
0, nullptr);
|
|
#else
|
|
_ctx = swr_alloc_set_opts(nullptr, _target_channel_layout, _target_format, _target_samplerate,
|
|
frame->get()->channel_layout, (AVSampleFormat) frame->get()->format,
|
|
frame->get()->sample_rate, 0, nullptr);
|
|
#endif
|
|
|
|
InfoL << "swr_alloc_set_opts:" << av_get_sample_fmt_name((enum AVSampleFormat) frame->get()->format) << " -> "
|
|
<< av_get_sample_fmt_name(_target_format);
|
|
}
|
|
if (_ctx) {
|
|
auto out = _swr_frame_pool.obtain2();
|
|
out->get()->format = _target_format;
|
|
|
|
#if LIBAVCODEC_VERSION_INT >= FF_CODEC_VER_7_1
|
|
out->get()->ch_layout = _target_ch_layout;
|
|
av_channel_layout_copy(&(out->get()->ch_layout), &_target_ch_layout);
|
|
#else
|
|
out->get()->channel_layout = _target_channel_layout;
|
|
out->get()->channels = _target_channels;
|
|
#endif
|
|
|
|
out->get()->sample_rate = _target_samplerate;
|
|
out->get()->pkt_dts = frame->get()->pkt_dts;
|
|
out->get()->pts = frame->get()->pts;
|
|
|
|
int ret = 0;
|
|
if (0 != (ret = swr_convert_frame(_ctx, out->get(), frame->get()))) {
|
|
WarnL << "swr_convert_frame failed:" << ffmpeg_err(ret);
|
|
return nullptr;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
FFmpegSws::FFmpegSws(AVPixelFormat output, int width, int height) {
|
|
_target_format = output;
|
|
_target_width = width;
|
|
_target_height = height;
|
|
|
|
_sws_frame_pool.setSize(AV_NUM_DATA_POINTERS);
|
|
}
|
|
|
|
FFmpegSws::~FFmpegSws() {
|
|
if (_ctx) {
|
|
sws_freeContext(_ctx);
|
|
_ctx = nullptr;
|
|
}
|
|
}
|
|
|
|
int FFmpegSws::inputFrame(const FFmpegFrame::Ptr &frame, uint8_t *data) {
|
|
int ret;
|
|
inputFrame(frame, ret, data);
|
|
return ret;
|
|
}
|
|
|
|
FFmpegFrame::Ptr FFmpegSws::inputFrame(const FFmpegFrame::Ptr &frame) {
|
|
int ret;
|
|
return inputFrame(frame, ret, nullptr);
|
|
}
|
|
|
|
FFmpegFrame::Ptr FFmpegSws::inputFrame(const FFmpegFrame::Ptr &frame, int &ret, uint8_t *data) {
|
|
ret = -1;
|
|
TimeTicker2(30, TraceL);
|
|
auto target_width = _target_width ? _target_width : frame->get()->width;
|
|
auto target_height = _target_height ? _target_height : frame->get()->height;
|
|
if (frame->get()->format == _target_format && frame->get()->width == target_width && frame->get()->height == target_height) {
|
|
// 不转格式 [AUTO-TRANSLATED:31dc6ae1]
|
|
// Do not convert format
|
|
return frame;
|
|
}
|
|
if (_ctx && (_src_width != frame->get()->width || _src_height != frame->get()->height || _src_format != (enum AVPixelFormat)frame->get()->format)) {
|
|
// 输入分辨率发生变化了 [AUTO-TRANSLATED:0e4ea2e8]
|
|
// Input resolution has changed
|
|
sws_freeContext(_ctx);
|
|
_ctx = nullptr;
|
|
}
|
|
if (!_ctx) {
|
|
_src_format = (enum AVPixelFormat) frame->get()->format;
|
|
_src_width = frame->get()->width;
|
|
_src_height = frame->get()->height;
|
|
_ctx = sws_getContext(frame->get()->width, frame->get()->height, (enum AVPixelFormat) frame->get()->format, target_width, target_height, _target_format, SWS_FAST_BILINEAR, NULL, NULL, NULL);
|
|
InfoL << "sws_getContext:" << av_get_pix_fmt_name((enum AVPixelFormat) frame->get()->format) << " -> " << av_get_pix_fmt_name(_target_format);
|
|
}
|
|
if (_ctx) {
|
|
auto out = _sws_frame_pool.obtain2();
|
|
if (!out->get()->data[0]) {
|
|
if (data) {
|
|
av_image_fill_arrays(out->get()->data, out->get()->linesize, data, _target_format, target_width, target_height, 32);
|
|
} else {
|
|
out->fillPicture(_target_format, target_width, target_height);
|
|
}
|
|
}
|
|
if (0 >= (ret = sws_scale(_ctx, frame->get()->data, frame->get()->linesize, 0, frame->get()->height, out->get()->data, out->get()->linesize))) {
|
|
WarnL << "sws_scale failed:" << ffmpeg_err(ret);
|
|
return nullptr;
|
|
}
|
|
|
|
out->get()->format = _target_format;
|
|
out->get()->width = target_width;
|
|
out->get()->height = target_height;
|
|
out->get()->pkt_dts = frame->get()->pkt_dts;
|
|
out->get()->pts = frame->get()->pts;
|
|
return out;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
std::tuple<bool, std::string> FFmpegUtils::saveFrame(const FFmpegFrame::Ptr &frame, const char *filename, AVPixelFormat fmt) {
|
|
_StrPrinter ss;
|
|
const AVCodec *jpeg_codec = avcodec_find_encoder(fmt == AV_PIX_FMT_YUVJ420P ? AV_CODEC_ID_MJPEG : AV_CODEC_ID_PNG);
|
|
std::unique_ptr<AVCodecContext, void (*)(AVCodecContext *)> jpeg_codec_ctx(
|
|
jpeg_codec ? avcodec_alloc_context3(jpeg_codec) : nullptr, [](AVCodecContext *ctx) { avcodec_free_context(&ctx); });
|
|
|
|
if (!jpeg_codec_ctx) {
|
|
ss << "Could not allocate JPEG/PNG codec context";
|
|
DebugL << ss;
|
|
return { false, ss };
|
|
}
|
|
|
|
jpeg_codec_ctx->width = frame->get()->width;
|
|
jpeg_codec_ctx->height = frame->get()->height;
|
|
jpeg_codec_ctx->pix_fmt = fmt;
|
|
jpeg_codec_ctx->time_base = { 1, 1 };
|
|
|
|
auto ret = avcodec_open2(jpeg_codec_ctx.get(), jpeg_codec, NULL);
|
|
if (ret < 0) {
|
|
ss << "Could not open JPEG codec, " << ffmpeg_err(ret);
|
|
DebugL << ss;
|
|
return { false, ss };
|
|
}
|
|
|
|
FFmpegSws sws(fmt, 0, 0);
|
|
auto new_frame = sws.inputFrame(frame);
|
|
if (!new_frame) {
|
|
ss << "Could not scale the frame: " << ffmpeg_err(ret);
|
|
DebugL << ss;
|
|
return { false, ss };
|
|
}
|
|
|
|
auto pkt = alloc_av_packet();
|
|
ret = avcodec_send_frame(jpeg_codec_ctx.get(), new_frame->get());
|
|
if (ret < 0) {
|
|
ss << "Error sending a frame for encoding," << ffmpeg_err(ret);
|
|
DebugL << ss;
|
|
return { false, ss };
|
|
}
|
|
|
|
std::unique_ptr<FILE, void (*)(FILE *)> tmp_save_file_jpg(File::create_file(filename, "wb"), [](FILE *fp) {
|
|
if (fp) {
|
|
fclose(fp);
|
|
}
|
|
});
|
|
|
|
if (!tmp_save_file_jpg) {
|
|
ss << "Could not open the file " << filename;
|
|
DebugL << ss;
|
|
return { false, ss };
|
|
}
|
|
|
|
while (avcodec_receive_packet(jpeg_codec_ctx.get(), pkt.get()) == 0) {
|
|
fwrite(pkt.get()->data, pkt.get()->size, 1, tmp_save_file_jpg.get());
|
|
}
|
|
DebugL << "Screenshot successful: " << filename;
|
|
return { true, "" };
|
|
}
|
|
|
|
} // namespace mediakit
|
|
#endif // ENABLE_FFMPEG
|